A magnitude 5.5 earthquake has struck very close to Pakistan's capital of Islamabad early on Saturday morning, the Pakistan Meteorological Department (PMD) says.
The tremor struck at a shallow depth of 10 kilometres, according to PMD, with the epicentre located 23 kilometres to the northeast of Islamabad.
It was followed by two weak tremors at 02:30 am local time of magnitude 2.5 and 2.9 at 03:01 am.
According to the Pakistan Meteorological Department, the earthquake was felt in several Pakistani cities in the provinces of eastern Punjab and north-western Khyber Pakhtunkhwa.
The US Geological Survey (USGS) has put the size of the quake at magnitude 5.1 and the depth at 26 kilometres.
No damage or injuries have been reported.
20:59 UTC ( local time: 01:59; 2015-07-25 @ epicenter)
23 km NE of Islamabad, Pakistan
30 km (14mi) WSW of Murree, Pakistan
33 km (16mi) NNE of Rawalpindi, Pakistan
35 km (17mi) S of Havelian, Pakistan